Doubly resonant sub-ppt photoacoustic gas detection with eight decades dynamic range

Anno: 2022

Autori: Wang Z., Wang Q., Zhang H., Borri S., Galli I., Sampaolo A., Patimisco P., Spagnolo VL., De Natale P., Ren W.

Affiliazione autori: Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Appl Opt, Changchun 130033, Peoples R China; Chinese Univ Hong Kong, Dept Mech & Automat Engn, Hong Kong, New Territories, Peoples R China; Univ Chinese Acad Sci, Beijing 100049, Peoples R China; CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy; LENS European Lab Nonlinear Spectscopy, I-50019 Sesto Fiorentino, Italy; Univ & Politecn Bari, Dipartimento Interateneo Fis, PolySense Lab, Via Amendola 173, Bari, Italy.

Abstract: Photoacoustic spectroscopy (PAS) based gas sensors with high sensitivity, wide dynamic range, low cost, and small footprint are desirable in energy, environment, safety, and public health. However, most works have focused on either acoustic resonator to enhance acoustic wave or optical resonator to enhance optical wave. Herein, we develop a gas sensor based on doubly resonant PAS in which the acoustic and optical waves are simultaneously enhanced using combined optical and acoustic resonators in a centimeter-long configuration. Not only the lower detection limit is enhanced by the double standing waves, but also the upper detection limit is expanded due to the short resonators. As an example, we developed a sensor by detecting acetylene (C2H2), achieving a noise equivalent absorption of 5.7 x 10(-13) cm(-1) and a dynamic range of eight orders. Compared to the state-of-the-art PAS gas sensors, the developed sensor achieves a record sensitivity and dynamic range.

Giornale/Rivista: PHOTOACOUSTICS

Volume: 27      Da Pagina: 100387-1  A: 100387-8

Maggiori informazioni: This research was supported by the National Na tural Science Foundation of China (NSFC) (62005267, 52122003) , Strategic Priority Research Program of Chinese Academy of Sciences (XDA17040513, XDA22020502) , University Grants Committee (14209220, 14208221) , and the Second Comprehensive Scientific Investigation of the Qinghai-Tibet Plateau (2019QZKK020802) .
Parole chiavi: Gas sensing; Photoacoustic spectroscopy; Quartz tuning fork; Optical cavity; Acoustic resonator; Ultra-high sensitivity; Ultra-wide dynamic range
DOI: 10.1016/j.pacs.2022.100387

Citazioni: 76
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-29
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